std::forward_list<T,Allocator>:: before_begin, cbefore_begin

iterator before_begin ( ) noexcept ;	(1)	(since C++11) (constexpr since C++26)
const_iterator before_begin ( ) const noexcept ;	(2)	(since C++11) (constexpr since C++26)
const_iterator cbefore_begin ( ) const noexcept ;	(3)	(since C++11) (constexpr since C++26)

Returns a non-dereferenceable iterator, incrementing the before-begin iterator gives exactly the same iterator as obtained from begin() / cbegin() .

The only usage cases are in functions insert_after() , emplace_after() , erase_after() , splice_after() and the increment operator.

Contents 1 Return value 2 Complexity 3 Example 4 See also

Return value

An iterator representing the position right before the begin iterator.

Complexity

Constant.

Example

This section is incomplete Reason: no example

See also

begin cbegin	returns an iterator to the beginning (public member function)
end cend	returns an iterator to the end (public member function)